JP2020149976A - Luminous device that images virtual illuminated surface of collector - Google Patents

Abstract

To provide a luminous lighting and/or signaling module or device that is compact and is more economical to produce.SOLUTION: A luminous device (2) comprises: a light source (4) that can emit light rays; a collector (6) with a reflective surface (6.2) that collects and reflects light rays emitted by the light source (4); an optical system (10) that projects light rays from the reflective surface (6.2) into a light beam (12) along an optical axis (8) of the device; and a reflecting mirror (7) that forms virtual images (4_, 6.2_) from the light source (4) and the reflective surface of the collector (6). The optical system (10) forms the virtual images (4_, 6.2_).SELECTED DRAWING: Figure 1

Description

The present invention relates to the field of light emitting lighting and cues, and more specifically to the field of automatic vehicles.

Patent Document 1 (FR 3 047 541 A1) discloses a lighting device including two optical modules arranged facing each other. Each of these two optical modules essentially includes a light source and a concentrator with a reflective surface. These two light sources are arranged on two surfaces on both sides of the common holder. Each reflective surface is a rotating surface in half the space bounded by the common holder of the light source. Thus, the two reflective surfaces form two hemishells facing each other. One of the two optical modules is configured to form an illumination beam with a flat cutoff, which corresponds to a so-called low beam. To do this, the module comprises a reflective surface with an edge called a "cutoff" edge, which is located at the focal point of the reflective surface. The light rays that hit the surface behind the cutoff edge are reflected toward the upper part of the projection lens, while the rays that pass in front of the edge hit the lower part of the lens without being deflected. .. This effect ensures an essentially flat cutoff of the beam. The other of the two optics works essentially the same, with the only exception that the focal point of the reflective surface is located in front of the cutoff edge. The beam produced by the second optical system is combined with the beam of the first system to produce a high beam (ie, a beam without a flat cutoff). This configuration is advantageous in that a beam containing a cutoff is used to generate a high beam.

Such a light emitting device has a drawback that requires high accuracy in positioning the deflector and the cutoff edge. Thus, the projection lens must be a thick lens due to its short focal length, which increases its weight and makes it difficult to manufacture (especially in terms of sink marks). In addition, the condenser has a considerable height, and accordingly has a volume in a considerable height direction.

French Patent Application Publication No. 3047541

An object of the present invention is to alleviate at least one of the drawbacks of the prior art described above. More specifically, it is an object of the present invention to provide a module or device for luminescent illumination and / or signaling that is compact and more economically manufactured.

The subject of the present invention is a light emitting device particularly for an automatic vehicle, which has a light source capable of emitting light rays and a light collecting surface configured to collect and reflect the light rays emitted by the light source. In a light emitting device including a device and an optical system configured to project light rays coming from a reflecting surface to form a light beam along the optical axis of the light emitting device, the reflecting surface of a light source and a condenser. It is a notable light emitting device in that it is provided with a reflecting mirror configured to form an image of the virtual image and the optical system is configured to form an image of the virtual image.

A light emitting module is formed by a light source and a reflecting surface. The light emitting module can form a light beam. The light emitting device may include a plurality of light emitting modules. If only one light emitting module is present, the light emitting device can be considered equivalent to the light emitting module. Each of its components (eg, one or more light sources, one or more concentrators, and optics, etc.) of the light emitting device is particularly specific to other components (eg, one or more light sources). It forms a stand-alone assembly in that it is immovably fixed via (not detailed) and thus optically stationary with respect to other components. Thus, one or more light emitting devices may be placed within the casing of the headlamp to perform all of the required prescribed lighting and signaling functions (in combination, where appropriate).

According to one advantageous embodiment of the present invention, the reflecting surface and the reflecting mirror of the concentrator are such that the light beam reflected by the rear portion of the reflecting surface is parallel to the optical axis or in the vertical plane. It is configured to have an inclination angle of 25 ° or less, preferably 10 ° or less with respect to the relative.

According to one advantageous embodiment of the present invention, the reflector is flat and parallel to the optical axis or tilted at an angle of less than 10 ° with respect to the optical axis.

According to one advantageous embodiment of the present invention, the light source emits light rays in a main direction perpendicular to the optical axis or in a main direction inclined by an angle of less than 25 ° with respect to the direction perpendicular to the optical axis. It is configured in.

According to one advantageous embodiment of the present invention, the reflective surface of the concentrator has an elliptical or parabolic profile. The reflective surface is preferably the rotating surface of the profile. The rotation is around the axis, which is advantageous to be parallel to the optical axis. According to one modification, the reflective surface is a free curved surface, a sweep surface, or an asymmetric surface. The surface may also include a plurality of parts.

According to one advantageous embodiment of the present invention, the reflector forms an extension of the reflecting surface of the condenser towards the optical system.

According to one advantageous embodiment of the present invention, the reflecting surface of the condenser is configured to reflect the light rays emitted by the light source in the main direction away from the optical axis.

According to one advantageous embodiment of the present invention, the reflector is formed on the condenser.

According to one advantageous embodiment of the present invention, the light source is arranged on the substrate and the reflector is aligned with the substrate.

According to one advantageous embodiment of the present invention, the reflecting surface of the concentrator is configured to reflect the light rays emitted by the light source in the main direction approaching the optical axis. It penetrates the substrate.

According to one advantageous embodiment of the present invention, the optical system has a focal point located within an area located between the imaginary light source and the virtual image of the reflecting surface.

According to one advantageous embodiment of the present invention, the focal point of the optical system is located along the optical axis behind the imaginary light source and on the virtual image of the reflecting surface.

According to one advantageous embodiment of the present invention, the optical system includes a lens corresponding to a part of a focusing lens centered on the virtual optical axis, and the optical axis is the optical axis. It passes through the focal point of the optical system in parallel with.

According to one advantageous embodiment of the present invention, the reflective surface of the concentrator has a trailing edge, the light beam is a beam containing a flat cutoff, which cutoff is an image of the trailing edge. Is.

According to one advantageous embodiment of the present invention, the light source and the light collector are located above the optical axis when the light emitting device is in a functioning position, and the cutoff of the light beam is a downward cutoff. ..

According to one advantageous embodiment of the present invention, the light source and the light collector are located below the optical axis when the light emitting device is in a functioning position, and the cutoff of the light beam is an upward cutoff. ..

According to one advantageous embodiment of the present invention, the light source, the light collector, and the light beam are a first light source, a first light collector, and a first light beam, respectively, and the light emitting device is a second light source. And a second light collector having a reflecting surface configured to collect and reflect the light rays emitted by the second light source, and the optical system projects the light rays coming from the reflecting surface. , The second light beam is configured to correspond to the image of the reflecting surface along the optical axis of the device.

The first concentrator and the first light source form the first light emitting module, and the second concentrator and the second light source form the second light emitting module.

It is advantageous that the light emitting device is configured so that the real image of the reflecting surface of the second concentrator illuminated by the second light source is the second light beam. For this purpose, the light rays reflected by the reflecting surface of the second concentrator, as opposed to the light rays reflected by the reflecting surface of the first concentrator, are not reflected by the reflector and are not reflected by the optical system. Is told to.

According to one advantageous embodiment of the present invention, the first concentrator and the first light source are on or one side of the optical axis opposite to the second concentrator and the second light source, respectively. The first concentrator and the first light source and the other second concentrator and the second light source are arranged side by side.

The means of the present invention are advantageous in that they are compact, easy to assemble, contain only a small number of parts, and make it possible to create a light emitting module or device capable of performing various lighting and / or signaling functions. Is. More specifically, the fact that it projects the illuminated reflective surface of the condenser makes it possible to create a light beam with a concentration of light at a position off-center in the vertical direction. Thus, the present invention very easily inverts the image produced, with one or more light beams depending on the illumination and / or signaling function to be performed (particularly the low beam function and the high beam function). It makes it possible to adjust.

Other features and advantages of the present invention will be better understood by the specification and drawings.

It is a schematic representation of a light emitting device according to the first embodiment of the present invention. It is a perspective view of the upper condenser of the light emitting device of FIG. It is a figure which looked at the irradiated surface inside the condenser in the light emitting device of FIG. 1 from the outside along the optical axis. It is a schematic representation of the emission image of the illumination beam produced by the light emitting device of FIG. It is a schematic representation of a light emitting device according to a modification of the first embodiment of the present invention. It is a schematic representation of the emission image of the illumination beam produced by the light emitting device of FIG. It is a schematic representation of a light emitting device according to the second embodiment of the present invention. It is a schematic representation of a light emitting device according to a modification of the second embodiment of the present invention.

In the following description, the concept of "upper" and "lower" of the optical axis in a light emitting device corresponds to the orientation when the device is in a functioning position (ie, the orientation in which the device is designed accordingly). It should be understood that it is for the light emitting device (in the correct orientation). Similarly, it should be understood that the concepts of "forward" and "backward" are for the overall direction of light along the optical axis when the device is in a functioning position.

1 to 4 show a first embodiment of a light emitting device according to the present invention.

FIG. 1 is a schematic representation of the light emitting device and its operating principle. The light emitting device 2 essentially includes a light source 4, a condenser 6 capable of reflecting light rays emitted by the light source to form a first light beam 12 along the optical axis 8 of the device, and the light emitting device 6. It includes a lens 10 for projecting a beam. Optical systems for projection other than the projection lens, particularly one or more reflectors, can be assumed.

It is advantageous that the light source 4 is a semiconductor light source, particularly a light emitting diode. The light source 4 emits light rays in a main direction perpendicular to the surface and the optical axis 8 in the illustrated example in a half space bounded by the main surface of the light source. According to the present invention, the main direction of emission is also tilted by an angle of 25 ° or less with respect to the direction perpendicular to the optical axis.

The condenser 6 includes a holding body 6.1 in the shape of a shell or a cap, and a reflecting surface 6.2 on the inner surface of the holding body 6.1. It is advantageous that the reflective surface 6.2 has an elliptical, parabolic, or free-curve profile. The light emitting device 2 also includes a reflecting mirror 7 arranged at an extension of the reflecting surface 6.2 of the condenser 6. The reflecting mirror 7 includes a holding body 7.1 and a flat reflecting surface 7.2 formed on the holding body 7.1. The retainer 7.1 may be connected to or adjacent to the retainer 6.1 of the condenser. It is advantageous that the reflecting surface 6.2 of the condenser 6 is a rotating surface around an axis parallel to the optical axis 8. Alternatively, it may be a free-form surface, sweep surface or asymmetric surface problem. The surface may also include a plurality of parts. The expression "parabolic" is generally emitted by a reflector whose surface has a single focal point, i.e., a light source where the rays are focused (ie, a light source located at this focused part). This applies to reflectors that have (one site) where the light beam is reflected from the surface and then projected over a long distance. Projected over long distances means that these rays do not focus towards a site located at least 10 times the size of the reflector. In other words, the reflected light rays do not or focus toward a single focused area, but even if this focused area is located at a distance of 10 times or more the size of the reflector. It is. Therefore, the parabolic surface may or may not include a parabolic portion. Reflectors with such surfaces are commonly used alone to produce light beams. Alternatively, the reflector may be used as a projection plane associated with an elliptical reflector. In this case, the light source of the parabolic reflector is the focus of the light rays reflected by the elliptical reflector.

It is advantageous that the reflecting mirror 7 (more specifically, its flat reflecting surface 7.2) is parallel to the optical axis 8. However, it may be tilted with respect to the axis by, for example, an angle of 10 ° or less. When tilted, it is advantageous for the reflector to travel away from the optical axis in the main direction of light propagation (ie, from the light source 4 to the projection lens 10).

It is advantageous that the shell- or cap-shaped concentrator 6 is made of a material having excellent heat resistance, for example, glass or a synthetic polymer compound such as polycarbonate PC or polyetherimide PEI.

The light source 4 is arranged at the focal point of the reflecting surface 6.2 in the condenser 6 so that the light rays are collected and reflected toward the reflecting mirror 7. The reflecting mirror 7 forms a virtual image 6.2 of the reflecting surface 6.2 and a virtual image 4 of the light source 4. These virtual images are shown by broken lines in FIG. The optical system 10 projects a virtual image 6.2 of the reflecting surface 6.2 and a light emitting image of the virtual image 4 of the light source 4. At least a part of these light rays reflected by the reflector 7 has an inclination angle α of 25 ° or less, preferably 10 ° or less with respect to the axis in the vertical plane. It seems to be under so-called Gaussian conditions that allow astigmatism (ie, the sharpness of the projected image) to be obtained. It is advantageous that it is a matter of light rays reflected by the rear portion of the reflecting surface 6.2 of the condenser 6.

The projection lens 10 has a first light incoming surface 10.1 and an outgoing light surface 10.2. The lens 10 is considered to be thin, for example, one having a thickness of less than 7 mm along the optical axis. That is especially because of its low lens height and long focal length. The lens 10 may have a focal point 10.3 which is advantageous to be located between the imaginary light source and the virtual image of the reflecting surface. It is advantageous that the focal point 10.3 is located within an area 6.3 located between the reflective surface 6.2 and the virtual images 6.2 and 4 of the light source 4. In this case, the focal point may be located in the axial direction (ie, along the optical axis) behind the virtual image 4 of the imaginary light source 4 and on the virtual image 6.2 of the reflecting surface 6.2. This focus can also be located behind or in front of the virtual image of the reflecting surface 6.2 in the condenser 6 if it is in the vicinity (preferably within a range of less than 10 mm, preferably less than 5 mm). Please note.

It is also noted that it is a good idea for the lens 10 to be a focused lens that is symmetrical with respect to the optic axis 8 (dotted line) located above the optical axis 8 (preferably through the focal point 10.3). I want to.

The reflective surface 6.2 of the condenser 6, if it is elliptical, has a second focal point located in front of the lens 10 and at a distance from the optical axis 8. It should be noted that this focus can also be located behind and / or on the optical axis of the lens to reduce the width of the beam on the incoming plane of the lens if it is in the vicinity of the lens. I want to.

It is advantageous that the light source 4 and the concentrator 6 are the first light source and the first concentrator, in which case the device or the second light source 14 and the second concentrator 16 (drawn in dashed lines). ) Is provided. In this case, the first light source 4 and the first concentrator 6 (these form the first light emitting module) and the second light source 14 and the second concentrator 16 (these form the second light emitting module). Is on the opposite side of the optical axis 8. More specifically, the first light source 4 and the second light source 14 are on the opposite surfaces of the common substrate through which the optical axis 8 passes.

FIG. 2 is a perspective view from the rear of the condenser 6 in the light emitting device 2 of FIG. You can see the shape of the shell or cap of the retainer 6.1 and the fact that the reflective surface 6.2 (not shown) has a trailing edge of 6.2.1. Due to the fact that the retainer 6.1, and thus the reflective surface 6.2, forms a shell of a preferably symmetric surface of revolution bounded by a plane, the plane is at the rear edge. It contains 6.2.1. The trailing edge extends to the left and right on both sides of the axis of rotation in this plane. When light is applied to the reflective surface 6.2 from a light source, the entire surface is illuminated, which is particularly bounded by the trailing edge 6.2.1.

FIG. 3 shows the light intensity on the reflecting surface 6.2 of the concentrator as viewed from the outside along the optical axis. It is a problem of the projected image of the virtual image of the reflecting surface 6.2 of the condenser (the image is created by the reflecting mirror 7 (FIG. 1)). Specifically, it is the problem of the irradiance of the surface, that is, the power per unit area represented by W / m ² in the incident of electromagnetic radiation perpendicular to the direction of the surface. The dark areas that cover most of the surface correspond to lower irradiances, while the brighter central areas correspond to higher irradiances. You can see that the dark areas are clearly bounded by the lower edge 6.2.1. In other words, the illuminated surface 6.2 originally has a sharp lower edge that can form a cutoff in the projected illumination beam that projects this surface, and at a central position at the same height as the light source. It also has a concentration of light.

FIG. 4 is a schematic representation of the image projected by the light emitting device of FIG. The horizontal axis H and the vertical axis V intersect on the optical axis of the light emitting device. These curves are isoilluminance curves, that is, curves corresponding to the parts of the light beam 12 having the same brightness represented by lux. The curve in the center corresponds to a higher brightness level than in the periphery.

In FIG. 4, it can be seen that the light beam 12 contains a flat downward cutoff that is essentially flush with the horizontal axis. The cutoff is not perfectly straight and has a curvature that corresponds to the aberrations of the image thus produced. In any case, the flat cutoff is created by the edge 6.2.1 (FIG. 3), which is the rear edge (FIG. 2) of the reflecting surface 6.2 of the condenser 6. For this purpose, the focal point 10.3 (FIG. 1) of the lens 10 is located near this edge (FIG. 3) on the virtual image of the reflecting surface, that is, behind the imaginary light source 4 of the (first) light source 4. It is advantageous to be located. It will also be seen that the illumination beam produced contains a strong concentration of light above the horizontal axis H.

The light beam 12 is thus particularly suitable for performing a high beam type illumination function that complements the low beam type illumination function.

FIG. 5 is a schematic representation of a modification of the light emitting device 2 of the first embodiment of the present invention (that is, the embodiment shown in FIG. 1). This modification differs from FIG. 1 in that each component of the light emitting device 2'is inverted 180 ° with respect to the optical axis 8, but is or equivalent in all other respects.

The resulting light beam 12'(which should be compared with FIG. 4) is shown in FIG. You can see that the luminescent image is inverted. That is, the luminescent image contains a flat cutoff above and a concentration of light below the horizontal axis and at the same height as the horizontal axis. This light beam is particularly suitable for performing low beam type functions.

FIG. 7 is a schematic view of a light emitting device according to a second embodiment of the present invention. Reference codes of the first embodiment are used to indicate elements that correspond or are the same, but the numbers of these codes are increased by 100. Further, the explanations made in the context of the first embodiment of these elements are incorporated. A unique code between 100 and 200 is used to indicate an element unique to this embodiment.

In this second embodiment, the light source and the reflectors configured to form a virtual image of the reflecting surface are arranged differently, that is, on or at least in the vicinity of the optical axis 108. It is different from the first embodiment of 1. Specifically, the reflecting mirror 107 extends along the optical axis 108, and it is advantageous that the optical axis 108 is aligned with the holding body of the light source 104. The reflecting surface 106.2 of the condenser is configured to reflect each light beam emitted by the light source 104 toward the reflecting mirror. These reflected rays correspond to the virtual images 106.2 and 104 of the reflecting surface 106.2 and the light source 104, which are drawn with dashed lines. The light beam 112 produced then essentially corresponds to the light beam 12 of the first embodiment shown in FIG.

Similar to the first embodiment, the lens 110 may have a focal point 110.3 which is advantageous to be located between the imaginary light source and the virtual image of the reflecting surface. It is advantageous that the focal point 110.3 is located in the area 106.3 located between the virtual image 106.2 of the reflective surface 106.2 and the virtual image 104 of the light source 104. In this case, the focal point may be located in the axial direction (ie, along the optical axis) behind the virtual image 104 of the light source 104 and on the virtual image 106.2 of the reflective surface 106.2. This focal point can also be located behind or in front of the virtual image 106.2 of the reflective surface 106.2 on the anti-condenser 106 if it is in the vicinity (preferably within a range of less than 10 mm, preferably less than 5 mm). Please note that.
Again, as in the first embodiment, it is advantageous that the reflecting mirror 107 (more specifically, its flat reflecting surface 107.2) is parallel to the optical axis 108. However, it may be tilted with respect to the axis by, for example, an angle of 10 ° or less.

Again, as in the first embodiment, it is advantageous that the light source 104 and the concentrator 106 are the first light source and the first concentrator, in which case the device or the second light source and the second condensing. It is equipped with a vessel. In this case, one first light source 104 and the first concentrator 106 and the other second light source and the second concentrator may be on opposite sides with respect to the optical axis 8. Alternatively, the light sources and the condensers may be arranged side by side.

FIG. 8 is a schematic representation of a modification of the light emitting device 102 of the second embodiment of the present invention (that is, the embodiment shown in FIG. 7). This modification differs from FIG. 7 in that each component of the light emitting device 102'is inverted 180 ° with respect to the optical axis 108, but is or is equivalent in all other respects.

The light beam 112'produced essentially corresponds to the light beam 12'shown in FIG. 6 produced by the light emitting device of FIG. It is a problem of the inverted light emission image with respect to the light beam 112 produced by the light emitting device of FIG. 7 which essentially corresponds to that of FIG. That is, the emission image includes a flat cutoff above and a concentration of light below the horizontal axis H and at the same height as the horizontal axis H. This light beam is particularly suitable for performing low beam type lighting functions.

Each of the light emitting devices described so far is generally particularly advantageous in that by projecting an irradiated reflecting surface, it is possible to create a light beam with a concentration of light at a position off-center in the vertical direction. It is a thing. These beams are particularly useful for performing low beam and high beam functions. These light emitting devices also allow the light source, and the concentrator associated with the light source, to be inverted through the use of a reflector, thus adapting to volumetric constraints.

Claims (18)

In particular, it is a light emitting device (2; 102) for an automatic vehicle.
-A light source capable of emitting light rays (4; 104) and
− A condenser (6; 106) having a reflecting surface (6.2; 106.2) configured to collect and reflect the light rays emitted by the light source (4; 104).
-It was configured to project a light beam arriving from the reflecting surface (6.2; 106.2) into a light beam (12; 112) along the optical axis (8; 108) of the light emitting device. Optical system (10; 110) and
In the light emitting device (2; 102) provided with
It includes a reflector (7; 107) configured to form a virtual image ( 4 , 6.2 ; 104 , 106.2 ) of the reflecting surface of the light source and the concentrator (6; 106), as well as A light emitting device (2; 102), wherein the optical system (10; 110) is configured to form an image of the virtual image ( 4 , 6.2 ; 104 , 106.2 ). The reflecting surface (6.2; 106.2) and the reflecting mirror (7; 107) of the concentrator (6; 106) are reflected by the rear portion of the reflecting surface (6.2; 106.2). The light beam is configured to be parallel to the optical axis (8,108) or have an inclination angle of 25 ° or less, preferably 10 ° or less with respect to the axis in the vertical plane. The light emitting device according to claim 1 (2; 102). The reflector (7; 107) is characterized by being flat and parallel to the optical axis (8; 108) or tilted by an angle of less than 10 ° with respect to the optical axis. The light emitting device (2; 102) according to any one of claims 1 and 2. The light source (4; 104) emits light rays in a main direction perpendicular to the optical axis (8; 108) or in a main direction inclined by an angle of less than 25 ° with respect to a direction perpendicular to the optical axis. The light emitting device (2; 102) according to any one of claims 1 to 3, wherein the light emitting device is configured in the above. One of claims 1 to 4, wherein the reflective surface (6.2; 106.2) of the concentrator (6; 106) has an elliptical or parabolic profile. The light emitting device (2; 102) according to one item. The claim is characterized in that the reflecting mirror (7) forms an extension portion of the reflecting surface (6.2) of the concentrator (6) toward the optical system (10). The light emitting device (2) according to any one of 1 to 5. The reflecting surface (6.2) of the condenser (2) is configured to reflect the light rays emitted by the light source (4) in the main direction away from the optical axis (8). The light emitting device (2) according to any one of claims 1 to 6, wherein the light emitting device (2). The light emitting device (2) according to any one of claims 6 and 7, wherein the reflector (7) is formed on the condenser (6). The light source (104) is arranged on a substrate (118), and the reflector (7) is aligned with the substrate (118), according to any one of claims 1 to 5. The light emitting device (102). The reflecting surface (106.2) of the condenser (6) is configured to reflect the light rays emitted by the light source (104) in the main direction approaching the optical axis (108). The light emitting device (102) according to claim 9, wherein the optical axis penetrates the substrate (118). The optical system (10; 110) is the virtual image ( 4 ; 104 ) of the light source (4; 104) and the virtual image (6.2; 106.2) of the reflecting surface ( 6.2 ; 106.2 ). The light emitting device (2) according to any one of claims 1 to 10, wherein the light emitting device (2) has a focal point (10.3; 110.3) placed in an area located between the two. 102). The focal point (10.3; 110.3) of the optical system (10; 110) is of the virtual image ( 4 ; 104 ) of the virtual light source (4; 104) along the optical axis (8; 108). The light emitting device (2; 102) according to claim 11, wherein the light emitting device (2; 102) is placed rearward on the virtual image ( 6.2 ; 106.2 ) of the reflecting surface (6.2; 106.2). ). The optical system includes a lens (10; 110) corresponding to a part of a focusing lens having a center on the optical axis ( 8 ; 108 ), and the optical axis ( 8 ; 108 ) is the optical axis. The light emitting device (2) according to any one of claims 11 and 12, wherein the optical system passes through the focal point (10.3; 110.3) of the optical system in parallel with (8; 108). 102). The reflective surface (6.2; 106.2) of the condenser (6; 106) has a trailing edge (6.2.1; 106.2.1) and the light beam (12; 112). ) Is a beam including a flat cutoff, and the cutoff is an image of the rear edge portion, according to any one of claims 1 to 13, the light emitting device (2; 102). ). The light source (4; 104) and the concentrator (6; 106) are located above the optical axis (8; 108) when the light emitting device is in a functioning position, and the light beam (12). The light emitting device (2; 102) according to claim 14, wherein the cutoff of 112) is a downward cutoff. The light source (4; 104) and the concentrator (6; 106) are located below the optical axis (8; 108) when the light emitting device is in a functioning position, and the light beam (12). The light emitting device (2'; 102') according to claim 14, wherein the cutoff of'; 112') is an upper cutoff. The light source (4; 104), the concentrator (6; 106), and the light beam (12; 112) are a first light source, a first concentrator, and a first light beam, respectively, and emit light. The apparatus includes a second light source (14) and a second light collector (16) having a reflecting surface configured to collect and reflect the light rays emitted by the second light source (14). The optical system (10; 110) is configured to project light rays arriving from the reflecting surface to form a second light beam along the optical axis of the apparatus and corresponding to an image of the reflecting surface. The light emitting device (2) according to any one of claims 1 to 16, wherein the light emitting device (2). The first light source (6; 106) and the first light source (4; 104) respectively have the second light source (16) and the second light source (16) with respect to the optical axis (8; 108). The side opposite to 14), or one of the first concentrator and the first light source and the other second concentrator and the second light source are arranged side by side. 17. The light emitting device according to claim 17.

Images